Weighing scale



H. O. HEM

WEIGHING SCALE Aug. 8, 1944.

Filed Jan. 15 1942 3 Sheets-Sheet 1 /a/ror 0. Hem

INVENTOR BY ATTORNEYS Q. HEM

WEIHING SCALE ilec1 Jan, 15, 1942 Sheets-Sheet 2 INVENTOR ATTORNEYS Aug.8 1944. H. G. HEM

WEIGHING SCALE Filed Jan. 15 .1942

5 Sheets-Sheet Ha /Var 0. Hem

lNVENTOR 5 M ATTORNEYS Patented Aug. 8, 1944 UNITED STATES ,i ATENTOFFICE WEIGHING SCALE Halvor 0. Hem, Toledo, Ohio, assignor to ToledoScale Company, Toledo, Ohio, a corporation of New Jersey 10 Claims.

This invention relates generally to weighing scales, and moreparticularly to weighing scales having an automatic loadcounterbalancing mechanism and a. plurality of manually actuated unitweights for augmenting the weighing capacity of the automatic loadcounterbalancing mechanism.

Scales of this kind heretofore were usually equipped with a series ofunit weights, suspended from each other by means of slotted lugsengaging spool-like projections extending from each weight in the mannerof a chain. The weight of each of these unit weights in scales of thiskind is such that when one of them is placed on, or suspended from, alever of the scale, its moment is just sufficient to counterbalance thepull on the lever resulting from a weight equal to the automaticweighing capacity of the scale, i. e., the chart capacity. When a loadplaced on the platform whose weight is equal to, or greater than, theautomatic weighing capacity has caused the load counterbalancingpendulums to swing into the position in which they counterbalance thisload, one of the unit weights when applied will return the pendulumsinto their initial position and thus condition the pendulums forcounterbalancing another load increment whose weight is equal to theautomatic weighing capacity.

The number of unit weights that can be provided in scales of this typehowever is limited. In addition to the space they occupy, they must alsobe spaced from each other when not in operative position to provideclearance for the angular travel of the lever which is adapted toreceive them.

In scales of this type the automatic weighing capacity of the scale islimited by the number of weight graduations that can be marked on theweight indicating chart. These must be so spaced 4 merals refer tosimilar parts throughout the several views.

Referring to the drawings:

Fig. I is a front elevational view of a scale embodying the invention.

Fig. II is an enlarged sectional view of the unit weight mechanismclearly showing its relation to the beam lever of the scale and to theload supporting means,

Fig. III is an enlarged fragment of the upper end of the unit weightoperating rack, showing in detail the manner of its connection to unitweight indicating means.

Fig. IV is an enlarged fragmentary plan view of the unit weight and unitweight actuating means, sectioned substantially along the line IV-IV ofFig. II.

Fig. V is an enlarged fragmentary side elevation of a portion of theunit weight mechanism sectioned substantially along the line V-V of Fig.IV, showing unit weight actuating means in detail; and

Fig. VI is an enlarged fragmentary end elevation sectioned substantiallyalong the line VI-VI of Fig. V.

Referring to the drawings in detail:

Since the embodiment of this invention may be used in connection withany preferred type of scale lever and platform structure, and it per seforms no part of this invention, the platform and lever system is notshown in detail. A fragment of a platform 8, a nose 9 of the leversystem, and a connecting stirrup ID are illustrated in Fig. II.

Mounted upon a shelf I I of a scale casing or cabinet I2 is a fulcrumstand I3 provided with hearing blocks l4 in its upper end. These hearingblocks, which are preferably of the selfaligning type, support fulcrumpivots I5 of a beam lever I6. Laterally extending load pivots I7, whichare in spaced relation to the fulcrum pivots I5, support suitablebearings l8 of a stirrup I9 fixed to the upper end of a draft rod 20whose lower end, by means of the stirrup IB, engages the nose 9 of theplatform supporting lever system. Laterally extending power pivots 21 inthe lever I6 engage a suitable bearing 22 in a stirrup 23 suspended fromthe lower end of a draft rod 24 whose upper end, by means of a stirrup25, engages load pivots 26 in a pendulum lever 21. This pendulum leveris provided with fulcrum pivots 28 by means of which it is supportedupon suitable bearings 29 mounted in a fulcrum bracket 30 in theinterior of a substantially watchcaseshaped indicator housing 3| whichis erected upon a rigid deck 32 of the casing or cabinet I2.

To transmit the pull of a load, a power pivot 33, in the nose of thependulum lever 21, engages a suitable bearing in a stirrup 34 suspendedfrom the head of a bolt 35 threaded and locked into a yoke 36. Parallelfaces of this yoke are clamped to the lower ends of flexible metallicribbons 31 whose upper ends overlie and are clamped as at 38 to theupper ends of arcuate faces of power sectors 39. Each of these powersectors 39 is a component part of a load counterbalancing pendulum 40.In addition to the power sectors 39, each pendulum 40 comprises a pairof fulcrum sectors 4|, one of which being positioned on each side of thepower sector, a pendulum body 42, having a stem 43 studded in its lowerend, and a pendulum weight 44 that is adjustably threaded on thependulum stem 43 in the usual manner.

These pendulums 48 are operatively mounted upon a pendulum frame 45 bymeans of flexible metallic ribbons 46 whose upper ends are clamped as at41 to parallel machined faces of the pendulum frame 45. The lower endsof the ribbons 46 overlie the arcuate faces of the fulcrum sectors II towhose lower ends they are clamped as at 48.

For the purpose of actuating a weight indicator, a compensating frame 49is pivotally attached to the centers of revolution of the loadcounterbalancing pendulums 40, and at a point midway the axes of pivotalattachment, a rack supporting bar 50 is pivotally mounted in the sideplates I of this compensating frame. Secured to' this rack bar is acurved shock absorbing plate 52 carrying an adjustable rack foot 53 intowhich the stem of a depending rack 54 is adjustably threaded. Teeth ofthis rack 54 mesh with the teeth of a pinion 55 circumjacently mountedupon an indicator shaft 56 whose tenon ends rest in antifriction ballbearings (not shown) which are fixed in horizontally extending flangesof the pendulum frame 45. To one of the tenons extending beyond thehorizontally extending flange an indicator 5'! is securely clamped.

By virtue of the above described structure, when a load is placed on theplatform 8 the pendulum lever 21 is deflected in a clockwise directionuntil the torque of the pendulums. which move outwardly and upwardly,balances the moment of the load on the platform. The compensating frame49, being pivotally attached to the centers of rotation of thesependulums, partakes of this movement and since this upward movement is afunction of the weight of the load the indicator 51 rotates through anangle proportionate to the load and is therefore adapted to indicate theweight in cooperation with a series of weight indicia 58 printed on anannular chart 59 which is bolted to suitably spaced bosses (not shown)in the interior of the indicator housing 3| immediately in back of theindicator 51.

Fixed in the lever IG, extending on the opposite side of the fulcrumpivots 15, are pivots 66 projecting laterally from each side of anexpanded portion. These pivots support bearing blocks 6I alignablyseated in the lower end of a bracket 62, and suspended from the ends ofa pin 63, extending through this bracket perpendicular to the axis ofthe pivot 66, are two stirrup plates 64 which, by means of a pin 65,suspendingly retain the upper end of a unit weight supporting stem 56whose lower end is threaded through a boss 5'! in the interior of ahollow loading cox 68 whose cover 69 serves as a receiver for thelowermost unit weight of a series of unit weights I0, II, I2, '13 and I4which when functioning to counterbalance increments of load rest on eachother. In the illustrated embodiment of this invention the weight ofeach unit weight ID to 14 inclusive is such that its momentcounterbalances a load on the platform 8 weighing twice the chartcapacity.

Circumjacently on and clamped to the stem 66, in spaced relation to theuppermost unit weight I4, is a second weight receiver I5 which serves toreceive a unit weight I6. The weight of this unit weight is exactlyone-half of that of the unit weights ID to I4, therefore its momentcounterbalances a load on the platform equal to the chart capacity ofthe scale.

Each of the unit weights I0 to I4 and I6, which have a substantialoctagonal shape, has studded into opposite sides spool-like extensions11 which are adapted to be engaged by the V grooved ends of forked unitweight lifting arms I8, I9, 80, 8|, 82 and of an operating lever 83respectively. These forked arms and the lever 83, by means of spacedextensions, are freely mounted on shafts 84, 85, 86, 81, 88 and 89respectively which project through inwardly extending flanges 90 of aunit weight supporting bracket 9I securely fastened to one of the sidewalls of the cabinet I2 in its interior. The forked lever 83 (Figs. IVand V) has an integral downwardly directed extension 92 having a flatface 93. The purpose of this extension will later be more particularlyexplained. Also seated on the shafts 84, 85, 86, 81 and 88, between thespaced furcations of t e forked lifting arms, are spaced extensions oflever operating members 94, 95, 96, 91 and 98. These members havelaterally projecting fingers 99, I60, I6I, I62 and I03 respectively, andex tending through drilled holes in these fingers and in the flanges I04of the lifting arms are bolts I85. Circumjacently mounted on each ofthese bolts, between the finger and the flange, is a relatively stiffcompression spring I66. Nuts I01, threaded on the bolts I85, serve tocompress the springs I06 and to lock the lifting arms 18, I9, 80, BI, 82and th respective members 94, 95. 96, 91 and 98 into relatively rigidunits. Each unit in effect becomes a two-armed unit weight operatinglever of the first order which is lulcrumed upon one of the shafts ofthe series of shafts 84 to 88 inclusive.

The free ends of the lever operating members 94 to 98 inclusive areprovided with spaced extensions and rotatably mounted upon short shaftsI98 projecting through these extensions are rollers I69, III], III, H2and H3.

The springs I06 in the assembled unit weight operating levers serve toabsorb shock when the unit weights are actuated. For the purpose ofsequentially actuating the operating levers, a gear mechanism isprovided. This comprises a pinion II4 which is pinned to a shaft II5extending between the flanges of the bracket 9|. The forward end of thisshaft projects through a bore in a bushing II6 fixed in the front wallof the cabinet I2, and to the portion of the shaft II 5 that extendsexteriorly of the cabinet I2 is keyed a handle or handwheel Ill. Theinner face of a hub I I8 of the handwheel III is provided with amachined notch I I9 which serves to center or position the handwheelwith the aid of a steel ball I26 seated in a bore in the bushing H6. Theball I20 is urged to enter the notch II9 by a compression spring I2Iseated in the bore. The teeth of the pinion II4 mesh with the teeth of agear I22 keyed to a shaft I23 extending parallelly to the shaft II5,between the flanges 90 of the bracket 9|. Extending laterally from theear I22 is an integral eccentric cam I 24 whose face engages the flatsurface 93 of the downwardly directed extension 92 of the lifting lever83. The pitch diameters of the pinion H4 and of the gear I22 are soproportioned that for each complete revolution of the pinion the gear isrotated through an angle of 180.

Also pinned or keyed to the shaft I23 is a pinion I25 whose teeth meshwith the teeth of a rack I29 cut in one of the spaced faces of a slideI21 which is mounted for vertical sliding movement in a machined grooveof the bracket 9| Another spaced face I28 of the slide I2! is smooth andserves as a track-like abutment for the rollers I09 to H3 inclusive. Thelower edge of the slide I2? is provided with a bevel I29 for a purposewhich will later become clear. Studded into one side of the slide I21,immediately adjacent its up per end, is a pin I30, the extending portionof which enters an opening in the upper end of a suitably bent link I3Iwhose lower end as at I32 is pivotally connected to a flash operatinglever I33 whose other end is pivoted on a stud I34 projecting laterallyfrom a bracket I35 which is fastened to the rear wall of the casing orcabinet I 2.

A clevis I36 pivotally mounted upon a pin I31, extending through theflash operating lever I 33, has locked in its upper end, by means of anut I38, the lower end of a flash operating rod I39. The upper end ofthis rod, which is suitably bent to enter the housing 3 I, is providedwith a clevis I 40 which pivotally engages a lever I4I fulcrumed as atM2 to a suitable boss within this housing. The opposite end of the leverI4I supports a flash I 53 provided with a series of weight indicia I44which are adapted to be exposed in a small window I45 in the chart 59.

The lever I is provided with arms I45 which extend through the frontwall of the cabinet I2, and fastened to the extending ends of these armsare tare and capacity beams I41 and I48 respectively. These, with thenoises I49 and I50, serve their usual function.

To prevent swinging of the loading box 68, a check link l5I is providedwhose opposite ends pivotally engage the lower end of the supportingstem. 66 and a bracket I52 fastened to the bottom of the cabinet I2; andto facilitate the operation of the handwheel Hi, this is provided with ahandle I53.

Assuming that the automatic weighing capacity of the scale embodying theinvention is 1000 pounds, the weight of any load placed on the platform8 whose weight is less than 1000 pounds is directly indicated by theindicator 51 on the chart 59 in the usual manner. If a load weighing1500 pounds is placed on the platform 8, when there are no unit weightssuspended from the lever 10, the moment of the load causes the pendulumsto swing outwardly until they strike suitable stops (not shown) that areprovided for this purpose, and the indicator 5l' by coming to rest at apoint beyond the 1000 pound indicium of the series 58 gives notice tothe operator that the weight of the load is greater than 1000 pounds.The operator now grasps the handle I53 of the handwheel I I! and givesthis handwheel one complete turn. When this handwheel starts to rotatethe small steel ball I20, which serves to center the handwheel I fl, isforced out of the machined slot I !9 against the pressure of the springI2I and when the wheel has completed the turn it again enters the notchH9 in the hub of this handwheel. The resulting click indicates that theturn has been completed and the entry of the ball into the notch againdefinitely positions the members controlled by this handwheel.

The pinion I H, which is mounted on the shaft I I5 on which thehandwheel I I1 is fastened, thus also rotates through one completerevolution but having only one-half the number of teeth that the gearI22 has with which it meshes, it causes this gear to rotate through anangle of When the gear I22 is rotated, the face of the eccentric camI24, which is integral therewith, recedes. The fiat face 93 of theextension 92 of the lever 83 follows the face of the cam and the lever83 rocks about its fulcrum on the shaft 39 and thus gently deposits theunit weight IS on the receiver I5 clamped to the stem 06. The cam I24 isdesigned and proportioned to cause the lever 93 to deposit the unitweight 16 on the receiver and then to continue its rocking movement intoa position below the receiver so that it will not interfere with thefree oscillation of the lever I6 from which the unit weight 16 is nowsuspended. As has been previously mentioned, the unit weight I6 isadapted to counterbalance a load equal to the chart capacity, thereforein this example when it is deposited on the receiver I5 itcounterbalances an increment of 1000 pounds of the load on the platform8 and since the remaining increment of 500 pounds is within the chart capacity it is counterbalanced by the pendulums 40 and its weight isindicated by the cooperation of the indicator 5'! and the series 58 ofindicia on the chart 59.

When the handwheel II! is turned to deposit the unit weight I5, the gearI25 partakes of the rotating movement since it is keyed to the shaft I23on which the gear I22 is mounted and since it meshes with the rack I26cut in the slide I2I this slide moves upwardly a predetermined distance,and this upward motion is transmitted through the link I3I to the flashoperating lever I33. The lever I33 in consequence is rocked about itsfulcrum on the stud I34 and the movement of this lever is thentransmitted through the flash operating rod I30 to the lever I4Ifulcrumed in the interior of the indicator housing 3|. This lever isthus also rocked about its fulcrum through a definite angle and theflash I43 exposes the numeral 1000 of the series 144 in the window I45,notifying the operator of the scale that this indicated amount must beadded to the weight indicated by the indicator 5! on the chart 59.

Assuming that all the unit weights are in their inoperative positions,and a load, weighing for example 4172 pounds, is placed on the platform8,

the pull of this load is transmitted, through the means previouslydescribed, to the pendulums 40. These immediately swing into theiruppermost position against the previously referred to stops. Since theload is in excess of the counterbalancing capacity of these pendulums,the indicator 5! again comes to rest at a point beyond the 1000 poundindicium of the series 58 on the chart 59. The operator then, in themanner hereinbefore described, deposits the unit weight '55. Since thisadds only 1000 pounds to the counterbalancing capacity of the scale, theindicator remains stationary. The operator then turns the handwheel II'Ithrough another revolution. The cam I 24 during the second half of itsrevolution forces the extension 92 of the lever 83 outwardly thusraising the end of this lever which in its upward movement engages thespool-like extensions 11 of the unit weight l3 and lifts this unitweight off the receiver. Simultaneously the lowermost unit weight ofthis series is deposited on the loading box cover or receiver 69 so thatnow its weight moment acts in opposition to the moment of the loadacting on the draft rod 20. This is accomplished in the followingmanner.

Rotation of the shaft I23, on which the cam I24 is mounted, causes thegear I25 to raise the slide I21 an additional distance and the rollerI09 mounted in the operating member 94 of the unit weight lever 18,which heretofore has been resting against the abument formed by the faceI28 oi the slide I21 and which heretofore maintained the lever 18 in itsraised position, now glides along the face of the beveled portion I29 onthe end of this slide I21 as it is moving upwardly until this rollercomes to rest against the bottom of the groove in the unit weightsupporting bracket GI in which the slide is movably mounted. This causesthe lever 18, supporting the unit weight 10, to rock in an anticlockwisedirection about its fulcrum on the shaft 84 and to deposit the unitweight 10 on the unit weight receiver 69.

Since this unit weight is capable of counterbalancing only 2000 poundsof load, the indicator still remains in the position it assumed when theload was placed on the platform. The operator then rotates the handwheelII1 through another revolution and in the described manner the unitweight is again deposited on the receiver 15. During this revolution ofthe handwheel the slide I21 was raised to actuate the flash I43 whichnow exposes the numeral 3000 in the window I45.

When the unit weights 10 and 16 cooperate with the pendulums 40, thecounterbalancing capacity of the scale is 4000 pounds, but since this isless than the weight of the load assumed in this example thecounterbalancing capacity must still be further increased.

When the unit weight 16 was deposited on the receiver 15 the secondtime, the slide I21 was raised a distance which brought the upper edgeof the beveled portion I29 to the level of a horizontal plane passingthrough the center of revolution of the roller I III. (This roller is apart of the assembly that includes the unit weight operating lever 19which actuates the unit weight 1I.) Another revolution of the handwheeltherefore again lifts the unit weight 16 off the receiver 15 and thefurther upward movement of the slide I21 causes the aforementionedroller III! to glide along the receding surface of the beveled portionI29 permitting the lever 19 to deposit the unit weight H on top of theunit weight 10 which is already suspended from the lever IS.

The deposition of the unit weight II conditions the scale to weigh loadsup to 5000 pounds. Since the assumed weight of the load in this exampleis 4172 pounds, an increment of 4000 pounds is now counterbalanced bythe two unit weights 19 and 1 I, and this amount is indicated by theflash I43 in the window I45. The remaining increment of 1'12 pounds iscounterbalanced by the pendulums 40 and indicated by the indicator 51 onthe chart 59. The sum of these indications is the weight of the load.

From the aforegoing it will be seen that by repeating the operationsdescribed, the weighing capacity of the scale can be progressivelyincreased until all the unit weights are suspended from the lever I6. Byrotating the handwheel I I1 in an anticlockwise direction the unitweights that are suspended from the lever I6 may be returned to theirinoperative positions thus conditioning the scale for another weighingoperation.

In conditioning the scale for weighing the assumed load of 4172 poundsin the example hereinbefore described, the unit weights 10 and H weredeposited on the member 69 and the unit weight 16, which had beenactuated several times in conditioning the scale, remained in itsinoperative position suspended from the operating lever 83.

In returning the unit weights to their inoperative positions, the firstrevolution of the handwheel II1 in an anticlockwise direction causes thecam I24 to lower the lever 83 and to deposit the unit weight 16 on thereceiver 15. Rotation of the handwheel H1 in an anticlockwise directioncauses the pinion I25 to move the slide I21 downwardly. Therefore,simultaneously with the lowering of the unit weight 16, the beveledportion I29 on the lower end of the slide I21 engages the roller III)and forces this outwardly causing the unit weight operating lever 19 torock in a clockwise direction and its ends engage the spoollikeextensions and raises the unit weight 1I off the unit weight 19 which isstill positioned on the receiver 69. Another anticlockwise revolution ofthe handwheel again lifts the unit weight 15 into its inoperativeposition. The length of the slide I21, the ratio of the gears, and thepositions of the rollers I99 to H3 inclusive are so designed andproportioned that the beveled end of the slide I21 in its downwardtravel will engage one of the rollers I09 to H3 inclusive every secondturn of the handwheel; therefore, when the unit weight I 6 is now raisedofi the receiver 15 the beveled portion I29 of the slide is broughtalmost into engagement with the roller I09 and then with the nextrevolution of the handwheel which again drops the unit weight 16 on thereceiver 15 it will cause the lever 19 to raise the weight 10 off thereceiver 89 and then a final revolution of the handwheel raises theweight 16 and the scale is again in condition to perform anotherweighing operation.

Having described the invention, I claim:

1. In a device of the class described, in combination, weighingmechanism comprising load receiving means, automatic loadcounterbalancing mechanism operatively connected to said load receivingmeans, manipulative load counterbalancing mechanism operativelyconnected to said load receiving means for cooperation with saidautomatic load counterbalancing mechanism, a weight indicating means foreach of said load counterbalancing mechanisms, said automatic loadcounterbalancing mechanism comprising a pendulum, said manipulative loadcounterbalancing mechanism including a series of weights and a singleweight, a pair of suspended weight receiving members, a sliding memberfor actuating said series of weights, a handle, a cam connected to saidhandle for actuating said single weight, gearing operatively connectedto said handle and said cam and actuating said sliding member wherebyupon actuation of said handle said cam causes the single weight to bealternately deposited upon and removed from, one of said weightreceiving members and the weights of said series of weights to besuccessively deposited on the other of said weight receiving memberswhenever said single weight is removed from its weight receiving member,each of said indicating means indicating the amount of the loadcounterbalanced by that load counterbalancing mechanism actuating saidindicating means. said weight indicating means for indicating the amountof weight counterbalanced by said pendulum comprising a relativelymovable chart and indicator, said indicating means for said manipulativeload counterbalancing mechanism comprising a movably mounted platebearing a number of weight indicating numerals and such number of weightindicating numerals on said movable plate being greater than the totalnumber of weights in said series of Weights and said single weight.

2. In a device of the class described, in combination, weighingmechanism including load receiving means, a beam lever operativelyconnected to said load receiving means, pendulum load counterbalancingmechanism operatively connected to said beam lever for counterbalancinga partof a load on said load receiving means, a pivot in said beamlever, manipulative load counterbalancing mechanism operatively engagingsaid pivot for counterbalancing the remaindercof such load, saidmanipulative load counterbalancing mechanism including a series of unitweights of equal mass, a unit weight of lesser mass, an operating leverfor each of said unit weights, a handle, a weight operating lever foreach of said unit weights, a cam operatively connected to said handlefor actuating the operating lever of said unit weight of lesser mass tocause said unit weight of lesser mass to exert influence on said loadreceiving means with each actuation of said handle and gearingoperatively connected to said handle for sequentially actuating anotherof said unit weight operating levers to cause one of said unit weightsof said series of unit weights of equal mass to exert influence on saidload receiving means with each alterhate actuation of said handle.

3. In a device of the class described, in combination,"weighingmechanism comprising load receiving means, automatic loadcounterbalancing mechanism operatively connected thereto, manipulativeload counterbalancing mechanism cooperating therewith, load indicatingmeans actuated by said automatic load counterbalancing mechanism, acasing, a lever within said casing, a unit weight receiver connected tosaid lever, a plurality of pivotally supported twoarmed operatinglevers, a unit weight held by one arm of each of said plurality ofoperating levers, a linearly movable member positioned to support theother arm of each of said operating levers to maintain the weightholding arm of each of said levers in elevated position, and means forimparting movement to said linearly movable member to Withdraw suchsupport for the arms of said operating levers whereby the weight of saidunit weights held by said operating levers rock said operating leversabout their pivotal support to deposit said unit weights on said unitweight receiver.

4. In a device of the class described, in combination, weighingmechanism comprising load receiving means, automatic loadcounterbalancing mechanism operatively connected thereto, manipulativeload counterbalancing mechanism cooperating therewith, load indicatingmeans actuated by said automatic load counterbalancing mechanism, acasing, a lever fulcrumed within said casing, a unit weight receiverpivotally connected to said lever, a bracket fixed to the interior ofsaid casing, a plurality of operating levers pivotally supported invertical alignment on said bracket, a unit weight held by one arm ofeach of said operating levers, a member linearly movable in said bracketand positioned to furnish support for the other arm of each of saidoperating levers to maintain the weight holding arm of each of saidoperating levers in elevated position and manipulative means extendingexteriorly of said casing for imparting movement to said linearlymovable member to successively withdraw such support for the arms ofsaid operating levers whereby the weight of said unit weights held bysaid operating levers successively rock said operating levers abouttheir pivotal support to deposit one or said unit weights on said loadreceiver and the other of said unit weights on the preceding unit Weighton said lead receiver.

in a device of the class described, in combination, weighing mechanismcomprising load receiving means, automatic load counterbalancingmechanism operatively connected to said lead receiving means,manipulative load counterbalancing mechanism operatively connected tosaid load receiving means for cooperation with said automatic loadcounterbalancing mechanism in counterbalancing weights of loads on saidload receiving means, a weight indicating means actuated by each of saidload counterbalancing mechanisms, said manipulative loadcounterbalancing mechanism including a series of Weights and a singleWeight, a pair of weight receiving members suspended in spaced verticalrelation from said weighing mechanism and manipulative means including ahandle, a shaft connected to said handle, a cam mounted on said shaft, apinion on said shaft and gear means actuated by said pinion whereby saidsingle weight is alternately deposited upon or removed from one weightreceiving member whenever said shaft is rotated through 360 and weightsof said series are successively deposited on the other weight receivingmember whenever said single weight is removed from its Weight receivingmember.

6. In a device of the class described, in combination, weighingmechanism including load receiving means, a pivoted beam lever, meansoperatively connecting said load receiving means to said beam lever atone side of the fulcrum thereof, manipulative load counterbalancingmeans including a plurality of weight receivers pivotally connected tosaid beam lever on the opposite side of its fulcrum, a series of unitweights, means for actuating said unit weights including a pivotallymounted lever for each of said unit weights, each of said levers havinga bell crank-like arm, and a sliding member having a beveled faceadapted to successively engage such bell crank-like arms to rock saidunit Weight operating levers about their fulcrums.

Z. in a device of the class described, in combination, a lever, a pairof unit weight receivers suspended from said lever, a single weight, aseries of unit weights, and a cam whereby said single unit weight isdeposited upon and removed from one of said unit weight receivers andmeans whereby the unit weights of said series are sequentially depositedon the other of said unit Weight receivers, and coordinating meanswhereby said cam for actuating said single unit weight is caused toalternately deposit said single unit weight on its unit weight receiverand remove said single unit weight from its unit weight receiversimultaneously with the deposition of each of the unit weights of saidseries upon the other of said unit weight receivers.

8. In a device of the class described, in combination a lever, a pair ofunit weight receivers suspended from said lever, a series of unitWeights, and means whereby one unit weight of said series is alternatelydeposited upon and removed from one of said unit weight receivers andthe other unit weights of said series are successively deposited uponthe other of said unit weight receivers, said first mentioned unitweight being removed from its receiver simultaneously with eachsuccessive deposition of the other unit weights of said series.

9. In a device of the class described, in combination, a pivotallymounted lever, a unit weight; receiver suspended from said lever, aplurality of pivotally mounted unit weight operating levers, the axes ofpivotal mounting of said unit weight operating levers extendingperpendicularly to the longitudinal axis of said lever, a slidablymounted member for actuating said unit weight operating levers, a unitweight for each of said unit weight operating levers and manuallyactuated means, said manually actuated means including a shaft, ahandwheel secured to said shaft and gearing actuated by said shaft foractuating said slidably mounted member whereby said unit weightoperating levers are sequentially actuated to cause said unit weights tobe deposited on said unit weight receivers.

10. In a device of the class described, in combination, a lever, twounit weight receivers suspended from a pivot mounted in said lever, aseries of unit weight operating levers, a unit weight supported by eachof said unit weight operating levers, means for sequentially actuatingsaid unit weight operating levers for depositing some of said unitweights sequentially on one of said unit weight receivers and foralternately depositing and removing another of said unit weights fromthe other of said unit weight receivers.

HALVOR 0. HEM.

